Elastic fluid generator arrangement



June 28, 1938. G. DIEDRICH ELASTIC FLUID GENERATOR ARRANGEMENT Filed June 29, 1937 Ifiventor GUncher Dieclrich, by F? H i Attorney.

Patented June 28, 1938 UNITED STATES 2,122,280 ELASTIC FLUID GENERATOR ARRANGE- MEN! cumm- Diedrich. steam.

General Electric Company,

New York Germany, assignor to a corporation of Application June 29, 1937, Serial No. 151,017

In Germany July I, 1936 1 Claim- (Cl. 122-24) whereby better eiliciency is attained and quickstarting of the boiler assured. This is accomplished'by my invention by the'provision of an 15 arrangement in which the exhaust gases discharged from boththe boiler 'and the internal combustion engine are utilized for operating a single gas turbine.

For a better understanding of what I believe to be novel and my invention, attention is directed to the following description and the claims appended thereto in connection with the accommar e d In the drawing Fig. 1 represents a diagrammatic view partly in section of an elastic fluid generator arrangement embodying my invention; Fig. 2 is a sectional view along the line 2-2 of Fig. 1; and Fig. 3 illustrates a modification of a part of Fig. i. I The arrangement as shown in Figs. 1 and 2 comprises a boiler in including a heating element II for heating liquid to be evaporated and a burner l2 for supplying a mixture of fuel and air to the boiler. The heating element II has an inlet connected by a conduit I! to .a pump it for forcing, liquid through the element I I. The burner has an inlet conduit ii for receiving fuel from a fuel pump l8 and another inlet conduit ll for receiving air from a blower or compressor l8.

The blower l8 together with the boiler feed pump I4 and the fuel pump I 'are arranged on a common shaft I! which is driven by a gas turbine 20..

The latter has a bucket wheel 2i secured tc'a shaft 2m and a nozzle box 22 forming a rowof nozzles 28 for properly directing gases from the nozzle box to the buckets of the wheel 2|. The nozzle box 22 is connected by a conduit 24' to the boiler to receive combustion gases discharged therefrom; The turbine shaft 2la is suitably 50 coupled to the shaft is of the auxiliaries. Y a means for starting the auxiliaries and as As an additional drive means. for the auxiliaries all internal combustion engine 28 is provided'and suitably connected to the drive shaft is for the guxfliaries i n the p esent instance rected directly towards the.

Iwith nozzles ii and intermediary of the gas turbine shaft Ho. The engine 25 has anexhaust conduit 26 which in accordance with my invention is connected to the nozzle box 22 to discharge exhaust gases into said box and thereby to permit utilization of the 5 available energy of these exhaust gases.

In the arrangement of Figs. 1 and 2 the exhaust gases from the engine and from the boilen are "mixed in the nozzle box whereby the temperature of the exhaust gas from the engine is lowered and that of the boiler raised. Both of these effects are desirable in that first they prevent the setting up of high stresses in the gas turbine due to the high temperature of the exhaust gases from the engine and second they permit emcierit operation of the boiler in that the available energy in the combustion gases of the latter may be utilized to a greater extent in the boiler. f f

The available heat energy in the gases discharged from the'gas turbine through a conduit 21 is utilized to preheat the air conducted to the inlet of the blower l8. To this end a heat exchanger 28 is provided through which the gases discharged from the gas turbine are conducted to effect heat exchange with air flowing from the vatmosphere through the heat exchanger to the inlet of the blower [8. The preheating of the air to be forced by the blower it to the burner l2 facilitates starting operation in that it re- 30 duces the starting period.

During starting the auxiliaries l4, l6, l8 are driven by the gas turbine condition is operated by gases discharged from the engine 25. As soon as the boiler I0 is started 5 and combustion gases are formed these gases are conducted to the nozzle box 22. as an additional power supply for the gas turbine. During normal operation and low load condition the engine '25 may be disconnected. The exhaust conduit 40 26 of the engine 25 is preferably arranged so that the gases discharged from thenozzle box are diozzles 23 and in addition the outlet end 'of the exhaust conduit 26 is preferably amused to form a nozzle and thereby to cause a suction eflect on the combustion gases in the boiler. The advantage of creating a suction eflect by the exhaust gases of the engine is especially noticeable during the starting period of the boiler during which fresh air will be rap- 5 idly drawn through the boiler as a result of the injector action even before the blower is coupied to the exhaust gas turbine. Y

The modification in Fig. '3 shows a nozzle box 20 which during this other nozzles 32. In addition the box includes a partition 33 arranged to form two spaces in the nozzle box so that the combustion gases discharged from the boiler through the conduit M are conducted to one of the spaces including the nozzles 3|, whereas exhaust gases from the engine 25 are conducted to the other space including the nozzles 32. In this arrangement no mixing of the two kinds 0t gases takes place.

Having described the method of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof, I desire to have it understood that the apparatus shown is only illustrative and that the invention may be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the United States is:

Elastic fluid generator arrangement including the combination of a boiler, auxiliaries for operating the boiler, a gas turbine with a nozzle box and an internal combustion engine for driving a the auxiliaries, conduit means for conducting GI'jNTHER DIEDRICH. 

